20571978

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{3739}}^1$

素因数の和:3882

約数の個数: 32

約数和(自身を含む): 47393280

約数和(自身を除く): 26821302

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 131, 262, 393, 786, 917, 1834, 2751, 3739, 5502, 7478, 11217, 22434, 26173, 52346, 78519, 157038, 489809, 979618, 1469427, 2938854, 3428663, 6857326, 10285989, 20571978]

約数ペア:

[(1, 20571978), (2, 10285989), (3, 6857326), (6, 3428663), (7, 2938854), (14, 1469427), (21, 979618), (42, 489809), (131, 157038), (262, 78519), (393, 52346), (786, 26173), (917, 22434), (1834, 11217), (2751, 7478), (3739, 5502)]